Outcome Analysis of Reduction and Nonreduction Dismembered Pyeloplasty in Ureteropelvic Junction Obstruction: A Randomized, Prospective, Comparative Study.

Objectives:The objective of this study is to compare the changes in renal function and drainage following open dismembered pyeloplasty with and without renal pelvis reduction. Materials and Methods:Randomized prospective study of children with ureteropelvic junction obstruction undergoing pyeloplasty with (Group 1) and without (Group 2) pelvis reduction over an 18-month period. Postoperative function and drainage were assessed by ethylene dicysteine (EC) scan and intravenous urography (IVU) and renal pelvis size by ultrasonography. Results:Forty-two patients (2 months-11 years) participated. The mean preoperative EC scan function was Group 1: 45.88% ± 14.42% (5%-80%) and Group 2: 39.22% ± 9.75% (21%-53%). ( PPPPPPConclusion:Postoperative function remained stable in both groups. More number of patients achieved unobstructed drainage by 3 mo postoperative after reduction pyeloplasty but drainage patterns were mostly similar between reduction and nonreduction of pelvis group in late follow-up.